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Intermediate-band photosensitive device with quantum dots having tunneling barrier embedded in organic matrix

United States Patent

August 19, 2008
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A plurality of quantum dots each have a shell. The quantum dots are embedded in an organic matrix. At least the quantum dots and the organic matrix are photoconductive semiconductors. The shell of each quantum dot is arranged as a tunneling barrier to require a charge carrier (an electron or a hole) at a base of the tunneling barrier in the organic matrix to perform quantum mechanical tunneling to reach the respective quantum dot. A first quantum state in each quantum dot is between a lowest unoccupied molecular orbital (LUMO) and a highest occupied molecular orbital (HOMO) of the organic matrix. Wave functions of the first quantum state of the plurality of quantum dots may overlap to form an intermediate band.
Forrest; Stephen R. (Ann Arbor, MI)
The Trustees of Princeton University (Princeton, NJ)
11/ 304,687
December 16, 2005
UNITED STATES GOVERNMENT RIGHTS This invention was made with U.S. Government support under Contract No. 339-4012 awarded by U.S. Department of Energy, National Renewable Energy Laboratory. The government has certain rights in this invention.